Issue 32, 2023

Ga(IO3)3: a mid-IR nonlinear optical iodate with balanced performance between band gap and second harmonic generation response

Abstract

The balance between band gap and second harmonic generation (SHG) response, which are usually inversely related, is the key factor for achieving good performance in a mid-infrared (mid-IR) nonlinear optical (NLO) crystal. Still it remains a challenge to achieve this balance, which strongly hinders the development of mid-IR solid-state lasers. In this work, utilizing an aliovalent substitution strategy of functional units, we successfully realize mid-IR NLO balanced performance in a chiral iodate, Ga(IO3)3, which simultaneously exhibits a strong SHG response (13 × KDP) and a wide optical band gap (3.94 eV). The first-principles calculation is also performed to elucidate its NLO origin. Combining the experimental measurements and theoretical calculations, it is clear that Ga(IO3)3 possesses excellent comprehensive NLO performance including a strong SHG effect, a wide band gap, good thermal stability (450 °C), and a large birefringence, indicating its potential applications as a mid-IR NLO crystal.

Graphical abstract: Ga(IO3)3: a mid-IR nonlinear optical iodate with balanced performance between band gap and second harmonic generation response

Supplementary files

Article information

Article type
Paper
Submitted
05 May 2023
Accepted
05 Jun 2023
First published
06 Jun 2023

J. Mater. Chem. C, 2023,11, 10828-10833

Ga(IO3)3: a mid-IR nonlinear optical iodate with balanced performance between band gap and second harmonic generation response

D. Wang, X. Zhang, P. Gong, Z. Lin, Z. Hu and Y. Wu, J. Mater. Chem. C, 2023, 11, 10828 DOI: 10.1039/D3TC01570J

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